A corporate bullying lawsuit filed against a person or a group with the express purpose of silencing their protests. Usually under the pretext of "slander" or "libel" and the targets are often whistle-blowers.

A scrap metal company filed a 5 million dollar SLAPP in 2005 against an environmental non-profit after it blew the whistle on chemical runoff seeping into a sensitive salmon spawning river, claiming they were slandered. It's just another example of corporate bully-suing.